$12,990,000

445 GRAND BAY DR #PH2A, KEY BISCAYNE, FL 33149

4 beds5.5 baths7,400 sq ftCondo or villaBuilt 1996
Updated today, November 3, 2026

This home against Key Biscayne

$1,755 per sq ft, 44% over the Key Biscayne median
3 days on the market
$56,046 in property taxes (2025)
Waterfront

Key Biscayne today: 129 homes for sale, median list price $2,725,000.

About this home

Experience oceanfront living at its finest in this extraordinary floor-through penthouse at Grand Bay Residences, one of Key Biscayne’s most prestigious luxury addresses. Encompassing an impressive 7,400 square feet under A/C, this exceptional residence offers breathtaking panoramic views of the Atlantic Ocean, Biscayne Bay, and the Miami skyline. Two magnificent, oversized terraces facing east and west create an unparalleled indoor-outdoor living experience, where spectacular sunrises over the ocean and unforgettable sunsets over the bay become part of everyday life. Beautifully upgraded and designed for both grand entertaining and comfortable living, the residence features expansive living areas, an elegant formal dining room, gourmet kitchen, and private home theater. The magnificent primary suite is a true private sanctuary, featuring a generous walk-in closet and two separate, beautifully appointed bathrooms, offering the ultimate in comfort, privacy, and luxury. Three additional spacious bedrooms, each with its own en-suite bathroom, provide exceptional comfort and privacy. Residents enjoy an extraordinary resort-style lifestyle with direct beach and ocean access, concierge and valet services, a state-of-the-art fitness center, a spectacular swimming pool, and the impeccable service of Grand Bay’s dedicated professional staff. A rare opportunity to own a truly remarkable penthouse where space, sophistication and breathtaking views capture the best of this island.

Zoned schools

Elementary: Key Biscayne K-8 Center
Middle: Ponce de Leon Middle School
High: Coral Gables Senior High School

From Miami-Dade County Public Schools attendance zones.

Listing courtesy of One Sotheby's International Realty. MLS# A12113410.

Listing information is provided by the MLS and is deemed reliable but not guaranteed.

Listed October 31, 2026.

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